package com.suyin.ximoon.controller.system;

import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.Comparator;
import java.util.Date;
import java.util.HashMap;
import java.util.Hashtable;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Random;

import javax.servlet.ServletException;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.FileItemFactory;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
import org.apache.commons.io.FileUtils;
import org.apache.log4j.Logger;
import org.springframework.stereotype.Controller;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

import com.fasterxml.jackson.databind.ObjectMapper;
import com.suyin.ximoon.controller.base.BaseController;
import com.suyin.ximoon.util.Common;
import com.suyin.ximoon.util.PropertiesUtils;

/**
 * 
 * @author gyx
 * 
 */
@Controller
@RequestMapping("/kindeditor/")
@Transactional
public class KindEditorController extends BaseController{

	/**
	 * 日志
	 */
	private final Logger log = Logger.getLogger(KindEditorController.class);

	private static final ObjectMapper objectMapper = new ObjectMapper();
	private PrintWriter writer = null;

	@RequestMapping("testFileUpload")
	public String testImg(HttpServletRequest request,HttpServletResponse response){
		return Common.BACKGROUND_PATH + "/system/fileup/testFileup";
	}
	
	@RequestMapping(value = "upload", method = RequestMethod.POST)
	public void fileUpload(HttpServletRequest request,HttpServletResponse response){
		try {
		String savePath =  (String) PropertiesUtils.getProperties().get("img_url");
		// 文件保存目录URL
		String saveUrl =PropertiesUtils.getProperties().get("img_save_path") +  "/outImages/";
		log.info("savePath：" + savePath);
		log.info("saveUrl：" + saveUrl);
		// 定义允许上传的文件扩展名
		HashMap<String, String> extMap = new HashMap<String, String>();
		extMap.put("image", "gif,jpg,jpeg,png,bmp");
		extMap.put("flash", "swf,flv");
		extMap.put("media", "swf,flv,mp3,wav,wma,wmv,mid,avi,mpg,asf,rm,rmvb");
		extMap.put("file", "doc,docx,xls,xlsx,ppt,htm,html,txt,zip,rar,gz,bz2");
		// 最大文件大小
		long maxSize = 2000000;

		response.reset();
		response.setCharacterEncoding("UTF-8");
		response.setContentType("text/html");
		writer = response.getWriter();
		// writer.println(json); //想办法把map转成json
		if (!ServletFileUpload.isMultipartContent(request)) {
			writer.println(objectMapper.writeValueAsString(getError("请选择文件。")));
			return;
		}
		// 检查目录
		File uploadDir = new File(savePath);
		if (!uploadDir.isDirectory()) {
			writer.println(objectMapper.writeValueAsString(getError("上传目录不存在。")));
			return;
		}
		// 检查目录写权限
		if (!uploadDir.canWrite()) {
			writer.println(objectMapper.writeValueAsString(getError("上传目录没有写权限。")));
			return;
		}

		String dirName = request.getParameter("dir");
		if (dirName == null) {
			dirName = "image";
		}
		if (!extMap.containsKey(dirName)) {
			writer.println(objectMapper.writeValueAsString(getError("目录名不正确。")));
			return;
		}
		// 创建文件夹
		savePath += dirName + "/";
		saveUrl += dirName + "/";
		File saveDirFile = new File(savePath);
		if (!saveDirFile.exists()) {
			saveDirFile.mkdirs();
		}
		SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMdd");
		String ymd = sdf.format(new Date());
		savePath += ymd + "/";
		saveUrl += ymd + "/";
		File dirFile = new File(savePath);
		if (!dirFile.exists()) {
			dirFile.mkdirs();
		}
		FileItemFactory factory = new DiskFileItemFactory();
		// 设置文件的缓存路径
		// ((DiskFileItemFactory) factory).setRepository(new File("d:/tmp/"));
		ServletFileUpload upload = new ServletFileUpload(factory);
		upload.setHeaderEncoding("UTF-8");
		List<FileItem> items = upload.parseRequest(request);
		Iterator<FileItem> itr = items.iterator();
		while (itr.hasNext()) {
				FileItem item = itr.next();
				String fileName = item.getName();
				if (!item.isFormField()) {
					// 检查文件大小
					if (item.getSize() > maxSize) {
						writer.println(objectMapper.writeValueAsString(getError("上传文件大小超过限制。")));
						return;
					}
					// 检查扩展名
					String fileExt = fileName.substring(fileName.lastIndexOf(".") + 1).toLowerCase();
					if (!Arrays.<String> asList(extMap.get(dirName).split(",")).contains(fileExt)) {
						writer.println(objectMapper.writeValueAsString(getError("上传文件扩展名是不允许的扩展名。\n只允许" + extMap.get(dirName) + "格式。")));
						return;
					}

					SimpleDateFormat df = new SimpleDateFormat("yyyyMMddHHmmss");
					String newFileName = df.format(new Date()) + "_" + new Random().nextInt(1000) + "." + fileExt;
					try {
						File uploadedFile = new File(savePath, newFileName);
						// item.write(uploadedFile);
						FileUtils.copyInputStreamToFile(item.getInputStream(),uploadedFile);
					} catch (Exception e) {
						e.printStackTrace();
						writer.println(objectMapper.writeValueAsString(getError("上传文件失败。")));
					}

					Map<String, Object> msg = new HashMap<String, Object>();
					msg.put("error", 0);
					msg.put("url", saveUrl + newFileName);
					writer.println(objectMapper.writeValueAsString(msg));
				}
		  }
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

	private Map<String, Object> getError(String message) {
		Map<String, Object> msg = new HashMap<String, Object>();
		msg.put("error", 1);
		msg.put("message", message);
		return msg;
	}

	@SuppressWarnings("unchecked")
	@RequestMapping(value = "filemanager", method = RequestMethod.GET)
	public void fileManager(HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException {
		ServletOutputStream out = response.getOutputStream();
		String rootPath = (String) PropertiesUtils.getProperties().get("img_url");
		String rootUrl = "/ZMWEB/outImages/";
		// 图片扩展名
		String[] fileTypes = new String[] { "gif", "jpg", "jpeg", "png", "bmp" };
		String dirName = request.getParameter("dir");
		if (dirName != null) {
			if (!Arrays.<String> asList(new String[] { "image", "flash", "media", "file" }).contains(dirName)) {
				out.println("Invalid Directory name.");
				return;
			}
			rootPath += dirName + "/";
			rootUrl += dirName + "/";
			File saveDirFile = new File(rootPath);
			if (!saveDirFile.exists()) {
				saveDirFile.mkdirs();
			}
		}
		// 根据path参数，设置各路径和URL
		String path = request.getParameter("path") != null ? request.getParameter("path") : "";
		String currentPath = rootPath + path;
		String currentUrl = rootUrl + path;
		String currentDirPath = path;
		String moveupDirPath = "";
		if (!"".equals(path)) {
			String str = currentDirPath.substring(0,currentDirPath.length() - 1);
			moveupDirPath = str.lastIndexOf("/") >= 0 ? str.substring(0,str.lastIndexOf("/") + 1) : "";
		}

		// 排序形式，name or size or type
		String order = request.getParameter("order") != null ? request.getParameter("order").toLowerCase() : "name";

		// 不允许使用..移动到上一级目录
		if (path.indexOf("..") >= 0) {
			out.println("Access is not allowed.");
			return;
		}
		// 最后一个字符不是/
		if (!"".equals(path) && !path.endsWith("/")) {
			out.println("Parameter is not valid.");
			return;
		}
		// 目录不存在或不是目录
		File currentPathFile = new File(currentPath);
		if (!currentPathFile.isDirectory()) {
			out.println("Directory does not exist.");
			return;
		}
		// 遍历目录取的文件信息
		@SuppressWarnings("rawtypes")
		List<Hashtable> fileList = new ArrayList<Hashtable>();
		if (currentPathFile.listFiles() != null) {
			for (File file : currentPathFile.listFiles()) {
				Hashtable<String, Object> hash = new Hashtable<String, Object>();
				String fileName = file.getName();
				if (file.isDirectory()) {
					hash.put("is_dir", true);
					hash.put("has_file", (file.listFiles() != null));
					hash.put("filesize", 0L);
					hash.put("is_photo", false);
					hash.put("filetype", "");
				} else if (file.isFile()) {
					String fileExt = fileName.substring(fileName.lastIndexOf(".") + 1).toLowerCase();
					hash.put("is_dir", false);
					hash.put("has_file", false);
					hash.put("filesize", file.length());
					hash.put("is_photo", Arrays.<String> asList(fileTypes).contains(fileExt));
					hash.put("filetype", fileExt);
				}
				hash.put("filename", fileName);
				hash.put("datetime",new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(file.lastModified()));
				fileList.add(hash);
			}
		}

		if ("size".equals(order)) {
			Collections.sort(fileList, new SizeComparator());
		} else if ("type".equals(order)) {
			Collections.sort(fileList, new TypeComparator());
		} else {
			Collections.sort(fileList, new NameComparator());
		}
		Map<String, Object> msg = new HashMap<String, Object>();
		msg.put("moveup_dir_path", moveupDirPath);
		msg.put("current_dir_path", currentDirPath);
		msg.put("current_url", currentUrl);
		msg.put("total_count", fileList.size());
		msg.put("file_list", fileList);
		response.setContentType("application/json; charset=UTF-8");
		String msgStr = objectMapper.writeValueAsString(msg);
		out.println(msgStr);
	}

	@SuppressWarnings({ "rawtypes" })
	class NameComparator implements Comparator {
		public int compare(Object a, Object b) {
			Hashtable hashA = (Hashtable) a;
			Hashtable hashB = (Hashtable) b;
			if (((Boolean) hashA.get("is_dir")) && !((Boolean) hashB.get("is_dir"))) {
				return -1;
			} else if (!((Boolean) hashA.get("is_dir")) && ((Boolean) hashB.get("is_dir"))) {
				return 1;
			} else {
				return ((String) hashA.get("filename")).compareTo((String) hashB.get("filename"));
			}
		}
	}

	@SuppressWarnings({ "rawtypes" })
	class SizeComparator implements Comparator {
		public int compare(Object a, Object b) {
			Hashtable hashA = (Hashtable) a;
			Hashtable hashB = (Hashtable) b;
			if (((Boolean) hashA.get("is_dir")) && !((Boolean) hashB.get("is_dir"))) {
				return -1;
			} else if (!((Boolean) hashA.get("is_dir")) && ((Boolean) hashB.get("is_dir"))) {
				return 1;
			} else {
				if (((Long) hashA.get("filesize")) > ((Long) hashB.get("filesize"))) {
					return 1;
				} else if (((Long) hashA.get("filesize")) < ((Long) hashB.get("filesize"))) {
					return -1;
				} else {
					return 0;
				}
			}
		}
	}

	@SuppressWarnings({ "rawtypes" })
	class TypeComparator implements Comparator {
		public int compare(Object a, Object b) {
			Hashtable hashA = (Hashtable) a;
			Hashtable hashB = (Hashtable) b;
			if (((Boolean) hashA.get("is_dir"))&& !((Boolean) hashB.get("is_dir"))) {
				return -1;
			} else if (!((Boolean) hashA.get("is_dir"))&& ((Boolean) hashB.get("is_dir"))) {
				return 1;
			} else {
				return ((String) hashA.get("filetype")).compareTo((String) hashB.get("filetype"));
			}
		}
	}
}